Physics Chapter 2

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When there is no air resitance, objects of different masses dropped from rest

fall with equal accelerations and with equal displacements

Acceleration due to gravity is also called

free-fall acceleration

What is the SI unit of acceleration

m/s2

Which of the following units is the SI unit of velocity

meter per second

If you know the acceleration of a car, its initial velocity, and the time interval, which of the following can you predict

the displacement of the car, the magnitude of the car's final velocity, direction of the car's final velocity

Which of the following line segments on a position versus time graph is physically impossible

vertical line

Acceleration is defined as

the rate of change of velocity

Suppose you are given a position versus time graph. The slope o f a line drawn tangent to a point on the curve of this graph describes what quantity

...

The motion of a ball on an inclined plane is described by the equation Delta x =1/2 a (delta t)2 Which of the following quantities must have a value of zero

...

When a car's velocity is negative and its acceleration is negative, what is happening to the car's motion

...

When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion

...

Which of the following statement applies to the motion of a ball rising and then falling in free fall

...

What is the speed of an object at rest

0.0 m/s

Which of the following situations represents a negative displacement (Assume positive position is measured vertically upward along a y-axis

A cat jumps from a tree limb to the ground

Objects that are falling toward Earth in free fall move

at a constant velocity

A baseball catcher throw a ball vertically upward and catches it in the same spot as it returns to the mitt. At what point in the ball's path does it experience zero velocity and nonzero acceleration at the same time

at the top of its path

Which of the following is the equation for average velocity

V avg = Delta x/Delta t

Which of the following is the equation for acceleration

a= Delta v/delta t

Which would fall with greater acceleration in a vacuum - a leaf or a stone

They would accelerate at the same rate


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